Improvement in paper-bag machines



UNITED STATES PATENT OFFICE.

NICHOLAS LORTON AND JOHN S. DAVISON, OF CRANBERRY, JERSEY.

-IMPROVEMENT IN PAPER-BAG MACHINES.

Sepcication forming part of Letters Patent Nc. 105,099, dated July 5,1870.

To all whom t may concern:

Be it known that we, NICHOLAS LOETON and JOHN S. DAvrsON, of Cranberry,lin the county of Middlesex and State of New Jersey, have invented a newand useful Improvement in Paper-Bag-Folding Machines; and we do herebydeclare the following to be a full, clear, and exact description of thesame, reference being had to the accompanying drawings, in which- Figurelis a perspective View of our machine. Fig. 2 is an end elevation of thesame. Fig. 3 is a longitudinal section of the same. Fig. et is avertical cross-section of the pastetrough and roller, showing thebrake-spring.

This invention relates to a machine for fold ing and pasting paper bagsfrom blanks previously cut and fed to the machine asrequired; and itconsists, first, in the former and its oonnected mechanism; second, inthe construction and arrangement of the devices for operating thepasters, folders, Snc. v

That Others may understand our invention, its construction, and mode ofoperation, we will particularly describe it.l l

rEhe operative mechanism of the machine is supported by the strong frameA A.

The folding-table is composed of movable slats B B, which may beadjusted, as may be required, tO conform tothe width of the former andto fold bags of different widths.

The edges and end of the bag are folded by means of aps D D', which arehinged to the side and end of the folding-table, and operate in a mannersimilar to the corresponding parts of envelope and other foldingmachines. The uniform size of the bags, however, is secured by means ofa sliding pattern or former, E, which is brought forward over the blankafter the same has been laid upon the folding-table, and the paper isbent or folded over in conformity to its size.

The former E is made to be easily removable from its carriage I, so thata variety of formers may be employed, and the same machine may fold bagsof different sizes.

The former carriage I slides in a way or groove prepared for it beneaththe table C and behind the folding-table, and it is pushed forward andbackward by a lever, F, operated by a strap, G, and treadle H.

rlhe lever F is connected to the former-carriage I by a link, J, pivotedto said lever at one end, and to the carriage I at the other.

The lever Fis mounted on a shaft, K, which has its bearings in the sidebars of the frame A, and the spring L, or some equivalent de vice, isemployed to retract said lever and the former after they have beenbrought into operation by the treadle H.

The flaps D D are operated by means of straps M M, which pass from thetreadle N over the pulleys O O, at the ends of said flaps. Said straps,or continuations of them, extend over the pulleys O and are joined tothe spring P, by means of which the flaps are withdrawn after having'been actuated by the treadle N.

A pasting device is attached to one side and e to the end of thefoldingtable, by 'means of which the necessary edges of the blanks arepasted before being folded. The device for pasting the end-flap ispeculiar in its construction and is not represented in the drawing, asit is reserved for a separate application for Letters Patent.

The side-pasting device consists of a paste- I trough, Q, with apaste-roller, R, located on that side which is toward the machine. Saidroller dips into the paste, and is partiallyT rotated every time thetreadle N is depressed, by means of a strap, S, which is connected tosaid treadle at one end, and, passing over a pulley at one end of theroller R, descends to a spring, T, which retracts said strap when thetreadle N asccnds.

A stop of anyl kind may be interposedv to prevent a backward movement ofthe roller It, so that, as the treadle ascends, the strap S will slipover its pulley, and as it descends the roller will be rotated.

It is found that a small pressurebrake or spring, R', is suflicient forthis purpose. The

tension of the strap S upon its pulley is very slight during the upwardmovement of the treadle. A suitable scraper, which may be madeadjustable, is placed above the roller R to equalize the quantity ofpaste taken over by the roller.

As the blank is laid upon the folding-table, one edge is presented justover the pasteroller. 'lhe treadle 'H is then depressed to bring theformer E forward over the blank, and while being so depressed a pin, h,set in said treadle at the proper point, engages with a spring-latch, U,which is attached to a slide, V, and said slide is drawn downward withthe treadle.

The slide V is connected with a presser.

plate, W, by'a strap or wire, q', and the depression ofthe treadle,therefore, causes a depression of the presser W at the same time, andthe edge of the blank is thereby pressed downA upon the paste-roller,and is sure to receive its proper quantity of paste.

.It is not, however, desirable that the presser should remain i'ncontact with the pasteroll, and a trip, Y, is therefore arranged todisengage the springlatch U and allow the slide4 V to ascend before thetreadle H has finished its downward movement, so that the presser Wmerely makes a quick movement tof press the blank upon the paste-rolland is immediately released.

The blank having been laid upon the table, pasted, and the former drawnover it, the treadle N is depressed, and the aps D D' are thereby causedto fold the blank. The aps D D' are so arranged that the pasted edge ofthe blank is folded slightly in advance of the opposite edge, and theflap D' is provided with a ilexible plate, d, on its face, by means ofwhich a more effectual pressure is brought to bear upon the edges to beunited, and the folding of the bag is completed. The treadle N is thenreleased, and the aps D D' are retracted. When this has beenaccomplished, the treadle H is also released and the former E isretracted by the spring L. The bag would then be left upon the table,were not an automatic flier, C', arranged to remove and deposit ituponthe table C.

The flier C' consists of arms of wire set in a shaft, E', which rests inbearings above the table C, and transverse thereto.

Thearms C' are bent so as to extend under `the former E, and restbetween the slats of the table B when at rest.

. The tliershaft E' is actuated by means of a latch, F', attached tosaid shaft by a strap,

G', and actuated by engagement with an arm,

H",` set in the lever F. f ,y The strap G' passes from the shaft E underVa pulley, p, and thence in a horizontal direcas said lever returns whensaid former is reu i tracted, the arm H' engages with said latch afterthe former has passed entirely beneath the table C, and for this purposea little extra movement of said formeris necessary. As the lever F andarm H' continue to move backward after the engagement with the latch F',the latter is retracted also, and the ilier C' is actuated, but thelatch slips off the arm H', or is tripped `by the bridge-bar J' beforesaid arm has finished its stroke, and the flier, being thus liberated,is returned to its position on the folding-table by the spring q, andthe movements having all been completed, the machine is ready for thereception of another blank.

It will be Vobserved that weights may be substituted in the place ofretractiug'springs wherever the latteriare shown or referred to in thisspecification and drawing.

In Fig. 2 is shown a leaf or shelf, S', upon which the blanks are placedready to be fed to the machine.

Having described our invention, what we claim as new, is

l. The combination, in a paper-bag machine, of the sliding former-plateE, folding-flaps l) D', and a pasting device, R W, substantially as setforth.

2.- The combination and arrangement of the treadle H, linked lever F,sliding former-plate E, pasting device R W, folding-aps D D', andtreadle N, to complete the pasting and folding with two movements,substantially as described.

3. The combination, substantially as described, of the paste-roller R,band S, treadle N, retracting'spring T, and a stop or break, R', toproduce a forward rotation only of said roller.

4. The combination, in a paper-bag machine, of a sliding former, E, anda flier, C', for the purpose set forth.

5. The arrangement, substantially as described, of the treadle H,presser W, former E, and flier C', to actuate said devices successivelyby a single movement of said treadle.

6. The arrangement, substantially as described, ofthe treadle N, flaps DD', and pasteroll R, to actuate said devices with a single movement ofsaid treadle.

NICHOLAS LQRTON. JOHN S. DAVISON.

Witnesses:

JOHN G. GRovER, l

WILLIAM H. VAN HORN.

